Hi Cass,
I am very sorry to hear about your sister, but as you can see there is a lot of support. I dont want to add too much to your overload but just wanted to specifically add one thing which noone else has mentioned yet. Check whether there is a McGrath (or other) breast nurse in your area. They are very knowledgeable and supportive and they are often involved with the oncology team looking after you. I have had several breast care nurses and they have all been wonderful.
As for the hair, it is a bit of a shock to begin with but you get used to it very quickly, for the most part, and it grows back. I tried a wig but didn't like it, so just used caps etc. There are some quite fashionable ones out there. This is where I got mine Beaux Chapeaux Headwear in Wollongong area , they do a website with a postal service (not sure if I was allowed to post their website address here), but there are lots of places around. PM me if you need the address.
There is also a fertility information page here http://www.bcna.org.au/about-breast-cancer/young-women#fertility
Please feel free to contact me if you want to chat. I have had lumpectomy, bi-lateral mastectomy, genetic testing, chemo and hysterectomy...all in the public system which I found just fine.
Anyway, I wish your sister and all of your family all the best. Please let us all know how you are getting on. Hang in there, we will be thinking of you.
Take Care,
Julie xo